Gartner Research

Stretching Your Data Center Network Could Break Applications and Waste Money

Published: 13 April 2015

ID: G00272966

Analyst(s): Neil Rickard , Andrew Lerner , John Morency

Summary

Many network architects are considering "stretched VLANs" to satisfy data center interconnectivity requirements. While these approaches may appear as a simple fix, they often increase complexity, reduce performance and availability, and increase the overall cost of your network.

Table Of Contents
  • Key Challenges

Introduction

  • Stretching VLANs

Analysis

  • Don't Assume Stretched VLANs Are Required to Support VM Migrations or Active/Active Data Centers
    • Myth No. 1: Stretched VLANs Are Required for VM Migration
    • Myth No. 2: Stretched VLANs Are Required for Active/Active Data Centers
    • Simplifying IP and DNS Changes Associated With Workload Migration
  • Document the Risks Associated With VLAN Stretching in Order to Make an Appropriate Business Decision Regarding Whether to Implement
    • Technological Challenges
    • Vendor Lock-In
  • Use VLAN Stretching for Specific Usage Scenarios, but Avoid Underpinning a Business Continuity Strategy on It

Gartner Recommended Reading

©2019 Gartner, Inc. and/or its affiliates. All rights reserved. Gartner is a registered trademark of Gartner, Inc. and its affiliates. This publication may not be reproduced or distributed in any form without Gartner’s prior written permission. It consists of the opinions of Gartner’s research organization, which should not be construed as statements of fact. While the information contained in this publication has been obtained from sources believed to be reliable, Gartner disclaims all warranties as to the accuracy, completeness or adequacy of such information. Although Gartner research may address legal and financial issues, Gartner does not provide legal or investment advice and its research should not be construed or used as such. Your access and use of this publication are governed by Gartner’s Usage Policy. Gartner prides itself on its reputation for independence and objectivity. Its research is produced independently by its research organization without input or influence from any third party. For further information, see Guiding Principles on Independence and Objectivity.

Already have a Gartner Account?

Purchase this Document

To purchase this document, you will need to register or sign in above

Become a client

Learn how to access this content as a Gartner client.